One of my teachers used to say " Wise Man is learning from others mistakes, Smart man is learning from his own mistakes and the Fool is not learning anything at all"
So far I can classify myself only as a smart and I give you opportunity to learn from my mistakes.
To the point when testing a different LNBs in thread http://www.satsupreme.com/showthread...inge-reception
I came up with idea to buy and test
WS international ESX524U Universal LNBF -big mistake
I send them an email but obviously no reply
IT supposed to have 0.2db and the best conversion gain I could ever find 70-75db
BUT The LNB is Sipmly CRAP!
Even Cheap ROSS LNB from B&Q beats it on every frequency!
After doing a quick reserch about this "company"
*website is hosted at GoDaddy.com it says a lot
* production Lines are literally shit hole...... just have a look at the pick on their website..... Testing equipment probably dates to early or mid 80's , no automated assembly line and mess everywhere!
I do not mind for everybody to have their business, but I really hate when somebody trying to rip me off!
I bought this LNB on Ebay.us from Official reseller of WS International products. it cost me about 20 quid including delivery.
when I tested this LNB and I saw VERY BAD PEFORMANCE I wrote 2 emails - one email to seller and one to WS international about if item is genuine or not
Seller replied to me straight way with all the proof for me needed - more then it he offered full refund + postage costs just in case I may be just not happy for any reason.... I really believe in seller honesty.
From another hand WS International never replied to me ( and they never will)
to the point - I dismantled LNB and for now I have all the proof about WS International simply lie about theis specs.
I took all the pictures needed but it is too many of them to publish
* First I'd like to point just terrible assembly quality - honestly I could do it better in my garage
* Cheapest components in use (f connectors, Feedhorn)
* Use of not appropriate Glue ( all I had to do when taking the feed horn cup off just to twist it with bare hands)
* plus sealant and glue were everywhere with terrible leaks (inside the feed horn as well)
* Vertical polariser out of align
you may say it's not too bad - but I will take you a bit futher
here are the specs for WS international ESX524U supposed to have:
Input Frequency Range 10.7 - 12.75 GHz
L.O. Frequency 9750/10600MHz
L.O. Stability 1 MHz (-40 - +70° c)
Ouput Frequency Range 950 - 2150 MHz
Noise .2 dB typical
Conversion Gain 70-75dB typical
Input VSWR 2.5:1
Output VSWR 2.0:1 (max)
Connector F Type female
Impedence 75 ohm typical
Cross Polar Isolation >25dB (min.)
Image Rejection 45 dB (min.)
-50dBc @ 1 KHz
-75dBc @ 10 KHz
-95dBc @ 100KHz
Ca: 11.5 - 14.0 V = Vertical Polarization
Cb: 15.5 - 19.0 V = Horizontal Polarization
Operating Temperature -40 - +70 degrees Celsius
Storage Temperature -40 - +80 degrees Celsius
Relative Humidity 0 - 95 %
Throat Diameter 40mm
Next step I dismatled LNB
just guess what converter block is inside?
it is GKF-2134
It belongs to GECEN and here are original specs:
Input Frequency Range
L.O. Phase Noise
Output Frequency Range
Image Rejection 40dB(Min.)
Noise Figure Low Band:0.6dB(Typ.)
Conversion Gain 60dB(Typ.) Output Power 0dBm (Min.)(at 1dB gain compression)
Gain Flatness ±0.5dB/26MHz Connector Type 75Ω Female Connector
Cross POL. Isolation 25dB(Typ.) DC Current Consumption 160mA (Typ.)
L.O. Frequency Low Band:9.75GHz
High Band:10.60GHz Low/High Band Switching Low Band: 0 Hz
L.O. Frequency Stability ±1.0MHz(Max.)@+25°C
±2.0MHz(Max.)@-30°C~+70°C POL. Switching Voltage 10.5~14.0 V @VP
16.0~20.0 V @HP
Operating Temperature -30°C~+70°C
what we can see with WS International another example of re branding Chinese OEM and just SHAMELESSLY ADDING NEW NON EXISTING SPECS
I have flu for now but when I feel a bit better and have more time I will upload the picks as well